Massimo Sisti is a reputable professional with a nice house, a happy marriage, and two loving daughters, whose life is turned upside down when one day he finds a little girl tied up in his basement.
Caterina is a girl victim of amnesia, who finds herself in an unknown village without being able to remember how she got there. In reality he doesn't even have any memory of his own identity, so he accepts the collaboration of Tommaso Carta - a local writer - to try to unravel the mystery. At the same time, the two will also be involved in a strange murder case, perhaps connected to Caterina's memory loss.
